Physician profile

Brian M Karaszewski

Internal Medicine · Williamsville, NY

NPI 1255478376

$27,538.19

in general payments reported to CMS, 2019-2025

70 companies · $4,057 in 2025

The $4,057 reported for 2025 was more than what 97% of Internal Medicine providers received nationally (typical 2025 total: $156).

Payments by year

General payments by program year, as reported to CMS.

What the payments were for

Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.

View as a table
Payment typeAmount (2023-2025)
Food and Beverage$12,332.30
Education$36.49

Payment-type detail covers 2023-2025; earlier years are included in totals but not broken out here.

Who reported paying

General payments only, as reported to CMS. Product names cover 2023-2025.

CompanyGeneral paymentsYearsTop products
Boehringer Ingelheim Pharmaceuticals, INC. $3,015.78 2019-2025 Jardiance, Spiriva Respimat, Ofev
Abbvie INC. $2,683.99 2019-2025
Lilly USA, LLC $2,414.25 2019-2025 Mounjaro, Jardiance, Zepbound
Glaxosmithkline, LLC. $2,144.49 2019-2025 Trelegy Ellipta, Benlysta, Arexvy
Astrazeneca Pharmaceuticals LP $2,043.72 2019-2025 Saphnelo, Farxiga, Breztri
Amgen INC. $1,912.28 2019-2025 Otezla, Tavneos, Repatha
Pfizer INC. $1,192.15 2019-2025
Novo Nordisk INC $1,008.18 2019-2025 Ozempic, Rybelsus
Takeda Pharmaceuticals U.S.A., INC. $1,001.36 2019-2025 Trintellix, Cuvitru, Eohilia
Ucb, INC. $760.35 2019-2025 Bimzelx, Cimzia
Astellas Pharma US INC $752.42 2019-2024 Veozah, Myrbetriq
Amarin Pharma, INC. $604.49 2019-2023
Merck Sharp & Dohme LLC $585.05 2019-2025 Verquvo, Belsomra, Gardasil
Salix Pharmaceuticals, A Division of Bausch Health US, LLC $539.82 2019-2025 Xifaxan
Kowa Pharmaceuticals America, INC. $467.04 2019-2023 Seglentis, Livalo
Show all 70 companies
CompanyGeneral paymentsYearsTop products
E.R. Squibb & Sons, L.L.C. $455.48 2019-2025 Eliquis, Orencia
Janssen Biotech, INC. $452.94 2021-2025 Tremfya, Remicade, Stelara
Biocryst US Sales Co., LLC $451.52 2023-2025 Orladeyo
Sanofi-Aventis U.S. LLC $447.05 2019-2023
Exact Sciences Corporation $399.55 2023-2025 Cologuard Collection Kit, The Cologuard Plus Collection Kit
Novartis Pharmaceuticals Corporation $359.59 2019-2022
Janssen Pharmaceuticals, INC $348.64 2019-2023 Spravato
Radius Health, INC. $293.17 2019-2021
Bayer Healthcare Pharmaceuticals INC. $205.61 2021-2025
Abbott Laboratories $202.84 2019-2025 Freestyle Libre 3
Mylan Specialty L.P. $190.11 2019-2024 Yupelri
Vanda Pharmaceuticals INC. $179.47 2019-2022
Grifols USA, LLC $161.11 2019-2025 Xembify, Gamunex-C
Mallinckrodt Hospital Products INC. $157.06 2025 Acthar
Aurinia Pharma U.S., INC. $141.46 2021-2024 Lupkynis
Scilex Pharmaceuticals INC. $125.65 2019-2024
Regeneron Healthcare Solutions, INC. $121.85 2024-2025 Dupixent
Ibsa Pharma INC. $102.10 2024-2025 Licart, Tirosint, Flector
Celgene Corporation $98.53 2019
Phathom Pharmaceuticals, INC. $91.44 2023-2024 Voquezna
Zoll Services LLC (A/K/A Zoll Lifecor Corp) $90.66 2024 Lifevest
Teva Pharmaceuticals USA, INC. $83.41 2019-2022
Sobi, INC $79.34 2019-2025
Daiichi Sankyo INC. $77.63 2021-2022
Eisai INC. $77.15 2020-2025
Iti, INC. (D/B/A Intra-Cellular Therapies, INC.) $71.58 2025 Caplyta
Gilead Sciences, INC. $68.51 2020-2023
Axsome Therapeutics, INC. $55.19 2025 Auvelity
Arbor Pharmaceuticals, INC. $54.48 2019-2020
Endo Pharmaceuticals INC. $53.06 2019
Ultragenyx Pharmaceutical INC. $52.33 2022
Octapharma USA, INC. $46.48 2023-2025 Octagam Immune Globulin (Human)
Insulet Corporation $44.16 2025 Omnipod
Linus Health, INC. $41.12 2024 Core Cognitive Evaluation
Medtronic, INC. $40.96 2021-2022
Celltrion USA INC. $36.49 2023 Yuflyma
Grt US Holding, INC. $36.26 2022
Genzyme Corporation $35.52 2022-2025
Allergan, INC. $35.29 2019
Blueprint Medicines Corporation $34.30 2022
Idorsia Pharmaceuticals US INC $33.05 2023 Quviviq
Ionis Pharmaceuticals, INC. $28.24 2025 Dawnzera
Supernus Pharmaceuticals, INC. $28.20 2021
Horizon Therapeutics Plc $27.58 2019
Ironwood Pharmaceuticals, INC $25.63 2019
Collegium Pharmaceutical, INC. $24.27 2019
Boston Scientific Corporation $21.36 2025 Watchman Flx
Biogen, INC. $19.61 2025 Skyclarys
Sandoz INC. $16.80 2023 Hyrimoz
Alexion Pharmaceuticals, INC. $16.40 2022
Amneal Pharmaceuticals LLC $15.71 2022
Viatris Specialty LLC $15.57 2025 Yupelri
Promius Pharma LLC $15.00 2019
Paratek Pharmaceuticals, INC. $14.49 2023 Nuzyra
Bio Products Laboratory USA, INC. $11.82 2023 Gammaplex, Coagadex

Drugs and devices associated with these payments

CMS records which products a payment was associated with, not how the money was allocated. Association is not allocation: one payment can be associated with several products, and a product listing does not mean the payment was made because of that product. Product detail covers 2023-2025.

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Payment summary

Brian M Karaszewski

$27,538.19

in general payments reported 2019-2025

Years
2019-2025
Top company
Boehringer Ingelheim Pharmaceuticals, INC.
Context
The $4,057 reported for 2025 was more than what 97% of Internal Medicine providers received nationally (typical 2025 total: $156).

https://glasscript.com/doctor/283689/brian-m-karaszewski

Source: CMS Open Payments, program years 2019-2025. Payments are legal and often routine.

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Source: CMS Open Payments, program years 2019-2025, as reported to CMS by drug and device makers (published June 30, 2026). Drug and device detail covers 2023-2025.